US5557153A - Air-cooled rotating electrical machine - Google Patents
Air-cooled rotating electrical machine Download PDFInfo
- Publication number
- US5557153A US5557153A US08/306,622 US30662294A US5557153A US 5557153 A US5557153 A US 5557153A US 30662294 A US30662294 A US 30662294A US 5557153 A US5557153 A US 5557153A
- Authority
- US
- United States
- Prior art keywords
- rotor
- machine
- air
- cooling
- cooling air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/26—Structural association of machines with devices for cleaning or drying cooling medium, e.g. with filters
Definitions
- the invention relates to a method for cooling an air-cooled rotating electrical machine having an open cooling circuit, in the case of which mechanically filtered environmental air is passed through the cooling ducts in the stator and rotor and the machine air gap by means of fans which are arranged at both ends of the rotor shaft and, after this, is emitted to the environment again.
- the invention furthermore relates to a rotating electrical machine which is cooled in accordance with this method.
- a gas-cooled electrical machine having these features is disclosed, for example, in "Brown Boveritechnik” [Brown Boveri Technology], 3/86, Pages 133-138, especially FIG. 3 on page 135.
- one object of the invention is to provide a novel method for cooling an air-cooled rotating electrical machine having an open cooling circuit, which method manages with a minimum of investment costs.
- This object is achieved according to the invention in that only the cooling air which is to be supplied to the rotor is subjected to refiltering, the mechanically filtered cooling air which is to be supplied to the stator and possibly to the machine air gap being passed through the fans, while the cooling air which is to be supplied to the rotor is passed into the rotor on a separate route.
- the rotor's own ventilation is preferably used in this case for conveying the cooling air for the rotor.
- the invention is in this case based on the knowledge that, because of the easily understandable cooling gas supply in the stator, less damage occurs on or in the cooling ducts than in the more complex cooling air paths in the rotor when using cooling air which is contaminated with hazardous gases.
- the savings which can be achieved in this way initially relate to the investment costs: the hazardous-material filters become smaller so that only a fraction (approximately 15 to 20%) of the cooling air must be conditioned. Furthermore, the useful lives of the hazardous-material filters are increased.
- the rotating electrical machine which is cooled in accordance with the method according to the invention comprises a mechanical filter which is arranged outside the machine housing and from which a first cooling air flow can be supplied directly to the fans on both sides of the machine via first cooling air ducts, and a hazardous-material filter via which a portion of the prefiltered cooling air which leaves the mechanical filter is passed via second cooling air ducts.
- FIG. 1 shows a simplified longitudinal section of an air-cooled generator of a known type, with an open cooling circuit and a separate cooling air supply to the rotor;
- FIG. 2 shows an enlarged detail from FIG. 1, which indicates the special construction of the rotor end part as well as the fresh air paths to the rotor and stator;
- FIG. 3 shows an alternative design of the cooling air supply to the rotor, with ducts in the rotor shaft.
- FIG. 1 designates a pedestal bearing
- 2 designates an outer casing
- 3 designates a first inner casing
- 4 designates a second inner casing
- 5 designates a machine housing.
- the winding overhang 6 is supported on supporting plates 7 on a stator clamping plate 8.
- Radial ventilation slots 9a are provided in the laminated stator core 9, between the individual laminate element bodies.
- Tension rods 10 compress the laminated stator core together with stator clamping plates 8.
- the rotor 11 has rotor caps 12 at both ends.
- the winding connections in the winding overhang space are designated by 13, and the phase and star-point terminals by 14.
- An axial fan 15 is provided at each of the two machine ends.
- the radially inner end of the second inner casing 4 is constructed as an air duct ring 16.
- a dust filter 18 is provided in a foundation pit 17 underneath the machine.
- the cold air behind the dust filter 18 is designated by arrows 19 and the hot air from the stator is designated by arrows 20.
- Other arrows (which are not designated more precisely) indicate the various cooling air flows in the machine interior. Only one machine half can be considered in the following text since the machine is constructed symmetrically, with respect to the cooling.
- Cold and hot gas chambers are formed in the machine rear by means of housing ribs 24 and radial and axial separating walls.
- the said second cooling air flow flows into the latter from the fan 15, is forced through the ventilation slots 9a between the laminated core element of the laminated stator core 9 and passes into the said hot gas chambers 25 and 26.
- the hot cooling gas is passed via large-area perforations on the underneath of the machine housing 5 into an outlet flow space 28 in the foundation pit 17, and from there to the open air.
- the mechanically filtered air is passed directly from the filter 18 into the annular space 21 between the first inner casing 3 and the second inner casing 4.
- An airflow element 29 is passed through in each case one activated charcoal filter 30, where hazardous components such as sulphur dioxide etc. are removed.
- a different separating device for hazardous substances, which is matched to these hazardous materials, can also be used instead of an activated charcoal filter.
- the air which has been refiltered in this way is not passed into the space 31 between the outer shell 2 and first inner shell 3 until this has been done.
- the foundation pit 17 is divided into the different air ducting spaces by separating walls 32.
- FIG. 2 shows an enlarged longitudinal section, which is modified only in non-essential details, through the end part of the machine according to FIG. 1.
- identical parts or parts having the same effect are provided with the same reference symbols as in FIG. 1.
- the axial fan 15 is mounted on a shaft collar 33. Axially running through-holes 34 are provided in this shaft collar, distributed over its circumference.
- a first cylindrical cover 36 is provided between the cap plate 35 of the rotor cap 12 and the fan 15. This cylindrical cover 36 separates the winding overhang space 23 from the rotor space 37.
- a second cylindrical cover 38 which is mounted only on the said shaft collar 33, interacts with a third cylindrical cover 39. The latter is mounted on the first inner casing 2 and on the outer casing 2 and has perforations 40 distributed over its circumference. The mutually facing free ends of the second cover 38 and third cover 39 in this case form a rotating seal between the spaces 21 and 31.
- the shaft seal 2a between the rotor shaft 11 and the outer casing 2 is also indicated.
- the cooling airflow coming from the activated charcoal filter 30 passes through the space 31 and the perforations 40 into the space 41 between the rotor shaft and the covers 38 and 39, passes through the holes 34 in the shaft collar and flows into the rotor space 37. There it branches essentially into two flow elements. One flow element passes through the rotor winding overhang 42, and the other flow element flows through the rotor cooling ducts 11a. The two flow elements are combined in the machine air gap 22 and pass from there via the cooling slots 9a in the laminated stator core 9 into the hot gas chambers 25 and 26 (cf. FIG. 1). No special fan is required as the conveying means for the rotor cooling air, since the rotor's own ventilation is used here.
- cooling air supply from the space 41 to the rotor space 37 can also be implemented by cooling air passages 43 being incorporated in the rotor shaft, under the shaft collar.
- cooling air passages 43 are costly and, furthermore, weakens the rotor shaft.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
Description
Claims (10)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4331243.8 | 1993-09-15 | ||
DE4331243A DE4331243A1 (en) | 1993-09-15 | 1993-09-15 | Air-cooled rotating electrical machine |
Publications (1)
Publication Number | Publication Date |
---|---|
US5557153A true US5557153A (en) | 1996-09-17 |
Family
ID=6497725
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/306,622 Expired - Fee Related US5557153A (en) | 1993-09-15 | 1994-09-15 | Air-cooled rotating electrical machine |
Country Status (12)
Country | Link |
---|---|
US (1) | US5557153A (en) |
EP (1) | EP0643465B1 (en) |
JP (1) | JPH07170691A (en) |
KR (1) | KR950010291A (en) |
CN (1) | CN1064486C (en) |
AT (1) | ATE152554T1 (en) |
CZ (1) | CZ284102B6 (en) |
DE (2) | DE4331243A1 (en) |
ES (1) | ES2104240T3 (en) |
HU (1) | HUT71140A (en) |
PL (1) | PL304954A1 (en) |
RU (1) | RU2129328C1 (en) |
Cited By (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5717262A (en) * | 1993-10-20 | 1998-02-10 | J.M. Voith Gmbh | Cooling apparatus for an AC generator |
US5883448A (en) * | 1996-11-02 | 1999-03-16 | Asea Brown Boveri Ag | Gas-cooled electric machine |
US6126726A (en) * | 1998-07-06 | 2000-10-03 | Siemens Westinghouse Power Corporation | Generator hydrogen purge gas economizer with membrane filter |
US6396176B1 (en) * | 2000-04-21 | 2002-05-28 | General Electric Company | Electric motor fan seal ring |
US20030102730A1 (en) * | 2000-10-30 | 2003-06-05 | Capstone Turbine Corporation | Turbogenerator cooling method |
US20040019229A1 (en) * | 2002-07-25 | 2004-01-29 | Clariant Gmbh | Process for preparing acyloxybenzenesulfonates |
WO2005031948A1 (en) * | 2003-10-01 | 2005-04-07 | Abb Ab | An electrical rotating machine |
US20060024157A1 (en) * | 2004-06-01 | 2006-02-02 | Alstom Technology Ltd. | Gas-cooled electrical machine with pressure charging |
WO2006032515A1 (en) * | 2004-09-24 | 2006-03-30 | Aloys Wobben | Wind turbine comprising a generator cooling system |
US20110298317A1 (en) * | 2010-06-08 | 2011-12-08 | Bradfield Michael D | Electric Machine Cooling System and Method |
US20110298318A1 (en) * | 2010-06-08 | 2011-12-08 | Bradfield Michael D | Gravity Fed Oil Cooling for an Electric Machine |
US20110298316A1 (en) * | 2010-06-08 | 2011-12-08 | Bradfield Michael D | Electric Machine Cooling System and Method |
JP2013176235A (en) * | 2012-02-27 | 2013-09-05 | Mitsubishi Electric Corp | Rotary electric machine |
US20140028124A1 (en) * | 2011-04-06 | 2014-01-30 | Siemens Aktiengesellschaft | Electric machine |
US20140183990A1 (en) * | 2011-09-01 | 2014-07-03 | Abb Technology Ag | Arrangement and method for cooling an electric machine |
US20140300221A1 (en) * | 2011-08-29 | 2014-10-09 | Niels Erik Linnemann Nielsen | Electric motor |
US20160204680A1 (en) * | 2012-12-04 | 2016-07-14 | Siemens Aktiengesellschaft | Electric machine with combined air and water cooling |
US20160276882A1 (en) * | 2015-03-19 | 2016-09-22 | Hamilton Sundstrand Corporation | Method and assembly for cooling an electric machine |
CN106464084A (en) * | 2015-05-12 | 2017-02-22 | 三菱电机株式会社 | Rotary electrical machine |
US9631607B2 (en) | 2008-10-08 | 2017-04-25 | Aloys Wobben | Ring generator |
US20170257007A1 (en) * | 2014-09-08 | 2017-09-07 | Siemens Aktiengesellschaft | Generator for a power plant |
US10177618B2 (en) | 2016-03-15 | 2019-01-08 | General Atomics | Rotor assembly and method of manufacturing |
US10784748B2 (en) * | 2018-02-21 | 2020-09-22 | Honda Motor Co., Ltd. | Cooling structure of rotary electric machine and rotary electric machine |
US20210036581A1 (en) * | 2019-07-30 | 2021-02-04 | Taiho Kogyo Co., Ltd. | Motor cooling member |
US10923984B2 (en) | 2018-06-19 | 2021-02-16 | Siemens Mobility GmbH | Electric machine with improved dissipation of waste heat |
US20210091636A1 (en) * | 2019-09-25 | 2021-03-25 | Siemens Aktiengesellschaft | Speed-regulated external fans for the temperature-controlled throughput ventilation of turbogenerators, phase shifters, and rotating electrical machines for network stabilization |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6271608B1 (en) | 1996-03-29 | 2001-08-07 | Newage International Limited | Alternating current machines |
DE102006002173A1 (en) | 2006-01-16 | 2007-08-09 | Alstom Technology Ltd. | Gas-cooled electric machine, in particular generator |
CN101123380B (en) * | 2007-05-25 | 2010-10-27 | 中国科学院电工研究所 | Steamship generator with rotor free cooling and stator evaporation cooling |
DE102008033959B4 (en) * | 2008-07-21 | 2010-07-15 | Siemens Aktiengesellschaft | Electric machine with radial dividing plates for cooling air flow |
JP2013194619A (en) * | 2012-03-21 | 2013-09-30 | Mitsui Eng & Shipbuild Co Ltd | Gas turbine intake anti-icing device |
CN102735381B (en) * | 2012-06-15 | 2015-01-21 | 北京中陆航星机械动力科技有限公司 | Locked-rotor torque detection device and method for three-phase permanent magnet synchronous motor |
CN103490548B (en) * | 2013-09-18 | 2015-05-27 | 南车株洲电力机车研究所有限公司 | Traction motor |
CN103490541A (en) * | 2013-09-27 | 2014-01-01 | 南京磁谷科技有限公司 | High-speed motor self-cooling rotor |
EP3285372A1 (en) * | 2016-08-19 | 2018-02-21 | Siemens Aktiengesellschaft | Generator housing and generator with the generator housing |
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DE933939C (en) * | 1939-02-18 | 1955-10-06 | Siemens Ag | Ventilation arrangement for externally ventilated electrical machines with axial air duct |
US3566168A (en) * | 1968-07-01 | 1971-02-23 | Yaskawa Denki Seikakusha Kk | Eddy current rotary machine having torque transmission arrangement |
US3643119A (en) * | 1970-11-05 | 1972-02-15 | Gen Electric | Ventilated dynamoelectric machine |
US3840762A (en) * | 1972-03-22 | 1974-10-08 | Rockwell International Corp | Vacuum-cooled power tool |
DE2318090A1 (en) * | 1973-04-07 | 1974-10-24 | Licentia Gmbh | COOLING SYSTEM FOR A GAS COOLED ELECTRIC MACHINE |
US4273674A (en) * | 1978-01-13 | 1981-06-16 | General Electric Company | Thermal detecting paint compositions |
US4314831A (en) * | 1980-06-09 | 1982-02-09 | Mato Barbic | Air filter assembly in combination with motor vehicle generator |
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1993
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-
1994
- 1994-08-26 DE DE59402593T patent/DE59402593D1/en not_active Expired - Fee Related
- 1994-08-26 ES ES94113350T patent/ES2104240T3/en not_active Expired - Lifetime
- 1994-08-26 AT AT94113350T patent/ATE152554T1/en not_active IP Right Cessation
- 1994-08-26 EP EP94113350A patent/EP0643465B1/en not_active Expired - Lifetime
- 1994-09-07 PL PL94304954A patent/PL304954A1/en unknown
- 1994-09-12 JP JP6217554A patent/JPH07170691A/en active Pending
- 1994-09-13 CZ CZ942233A patent/CZ284102B6/en not_active IP Right Cessation
- 1994-09-14 HU HU9402638A patent/HUT71140A/en unknown
- 1994-09-14 RU RU94033352A patent/RU2129328C1/en active
- 1994-09-15 CN CN94115302A patent/CN1064486C/en not_active Expired - Fee Related
- 1994-09-15 KR KR1019940023450A patent/KR950010291A/en active IP Right Grant
- 1994-09-15 US US08/306,622 patent/US5557153A/en not_active Expired - Fee Related
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Cited By (45)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5717262A (en) * | 1993-10-20 | 1998-02-10 | J.M. Voith Gmbh | Cooling apparatus for an AC generator |
US5883448A (en) * | 1996-11-02 | 1999-03-16 | Asea Brown Boveri Ag | Gas-cooled electric machine |
US6126726A (en) * | 1998-07-06 | 2000-10-03 | Siemens Westinghouse Power Corporation | Generator hydrogen purge gas economizer with membrane filter |
US6396176B1 (en) * | 2000-04-21 | 2002-05-28 | General Electric Company | Electric motor fan seal ring |
US20030102730A1 (en) * | 2000-10-30 | 2003-06-05 | Capstone Turbine Corporation | Turbogenerator cooling method |
US6657332B2 (en) | 2000-10-30 | 2003-12-02 | Capstone Turbine Corporation | Turbogenerator cooling system |
US6720685B2 (en) * | 2000-10-30 | 2004-04-13 | Capstone Turbine Corporation | Turbogenerator cooling method |
US20040019229A1 (en) * | 2002-07-25 | 2004-01-29 | Clariant Gmbh | Process for preparing acyloxybenzenesulfonates |
WO2005031948A1 (en) * | 2003-10-01 | 2005-04-07 | Abb Ab | An electrical rotating machine |
US20060024157A1 (en) * | 2004-06-01 | 2006-02-02 | Alstom Technology Ltd. | Gas-cooled electrical machine with pressure charging |
US7271515B2 (en) * | 2004-06-01 | 2007-09-18 | Alstom Technology Ltd. | Gas-cooled electrical machine with pressure charging |
CN1705203B (en) * | 2004-06-01 | 2010-08-11 | 阿尔斯托姆科技有限公司 | Gas cooling electric machine with pressure unit |
WO2006032515A1 (en) * | 2004-09-24 | 2006-03-30 | Aloys Wobben | Wind turbine comprising a generator cooling system |
US20080197638A1 (en) * | 2004-09-24 | 2008-08-21 | Aloys Wobben | Wind Turbine Comprising a Generator Cooling System |
EP2141360A2 (en) * | 2004-09-24 | 2010-01-06 | Aloys Wobben | Wind turbine comprising a generator cooling system |
US8053918B2 (en) | 2004-09-24 | 2011-11-08 | Aloys Wobben | Wind turbine comprising a generator cooling system |
US8552576B2 (en) | 2004-09-24 | 2013-10-08 | Aloys Wobben | Wind turbine comprising a generator cooling system |
EP2141360A3 (en) * | 2004-09-24 | 2012-03-07 | Aloys Wobben | Wind turbine comprising a generator cooling system |
US9631607B2 (en) | 2008-10-08 | 2017-04-25 | Aloys Wobben | Ring generator |
US8519581B2 (en) * | 2010-06-08 | 2013-08-27 | Remy Technologies, Llc | Electric machine cooling system and method |
US8456046B2 (en) * | 2010-06-08 | 2013-06-04 | Remy Technologies, Llc | Gravity fed oil cooling for an electric machine |
US20110298316A1 (en) * | 2010-06-08 | 2011-12-08 | Bradfield Michael D | Electric Machine Cooling System and Method |
US20110298318A1 (en) * | 2010-06-08 | 2011-12-08 | Bradfield Michael D | Gravity Fed Oil Cooling for an Electric Machine |
US8269383B2 (en) * | 2010-06-08 | 2012-09-18 | Remy Technologies, Llc | Electric machine cooling system and method |
US20110298317A1 (en) * | 2010-06-08 | 2011-12-08 | Bradfield Michael D | Electric Machine Cooling System and Method |
US9871425B2 (en) * | 2011-04-06 | 2018-01-16 | Siemens Aktiengesellschaft | Electric machine |
US20140028124A1 (en) * | 2011-04-06 | 2014-01-30 | Siemens Aktiengesellschaft | Electric machine |
US9543807B2 (en) * | 2011-08-29 | 2017-01-10 | Grundfos Management A/S | Electric motor |
US20140300221A1 (en) * | 2011-08-29 | 2014-10-09 | Niels Erik Linnemann Nielsen | Electric motor |
US20140183990A1 (en) * | 2011-09-01 | 2014-07-03 | Abb Technology Ag | Arrangement and method for cooling an electric machine |
JP2013176235A (en) * | 2012-02-27 | 2013-09-05 | Mitsubishi Electric Corp | Rotary electric machine |
US10158272B2 (en) * | 2012-12-04 | 2018-12-18 | Siemens Aktiengesellschaft | Electric machine with combined air and water cooling |
US20160204680A1 (en) * | 2012-12-04 | 2016-07-14 | Siemens Aktiengesellschaft | Electric machine with combined air and water cooling |
US20170257007A1 (en) * | 2014-09-08 | 2017-09-07 | Siemens Aktiengesellschaft | Generator for a power plant |
US9793767B2 (en) * | 2015-03-19 | 2017-10-17 | Hamilton Sundstrand Corporation | Method and assembly for cooling an electric machine |
US20160276882A1 (en) * | 2015-03-19 | 2016-09-22 | Hamilton Sundstrand Corporation | Method and assembly for cooling an electric machine |
CN106464084A (en) * | 2015-05-12 | 2017-02-22 | 三菱电机株式会社 | Rotary electrical machine |
US10177618B2 (en) | 2016-03-15 | 2019-01-08 | General Atomics | Rotor assembly and method of manufacturing |
US10784748B2 (en) * | 2018-02-21 | 2020-09-22 | Honda Motor Co., Ltd. | Cooling structure of rotary electric machine and rotary electric machine |
US10923984B2 (en) | 2018-06-19 | 2021-02-16 | Siemens Mobility GmbH | Electric machine with improved dissipation of waste heat |
US20210036581A1 (en) * | 2019-07-30 | 2021-02-04 | Taiho Kogyo Co., Ltd. | Motor cooling member |
US11632018B2 (en) * | 2019-07-30 | 2023-04-18 | Taiho Kogyo Co., Ltd. | Motor cooling member |
US11824426B2 (en) * | 2019-07-30 | 2023-11-21 | Taiho Kogyo Co., Ltd. | Motor cooling member |
US20210091636A1 (en) * | 2019-09-25 | 2021-03-25 | Siemens Aktiengesellschaft | Speed-regulated external fans for the temperature-controlled throughput ventilation of turbogenerators, phase shifters, and rotating electrical machines for network stabilization |
US11522414B2 (en) * | 2019-09-25 | 2022-12-06 | Siemens Energy Global GmbH & Co. KG | Speed-regulated external fans for the temperature-controlled throughput ventilation of turbogenerators, phase shifters, and rotating electrical machines for network stabilization |
Also Published As
Publication number | Publication date |
---|---|
EP0643465A1 (en) | 1995-03-15 |
CN1064486C (en) | 2001-04-11 |
EP0643465B1 (en) | 1997-05-02 |
DE4331243A1 (en) | 1995-03-16 |
HU9402638D0 (en) | 1994-11-28 |
JPH07170691A (en) | 1995-07-04 |
CZ284102B6 (en) | 1998-08-12 |
DE59402593D1 (en) | 1997-06-05 |
CN1104000A (en) | 1995-06-21 |
ES2104240T3 (en) | 1997-10-01 |
RU2129328C1 (en) | 1999-04-20 |
KR950010291A (en) | 1995-04-26 |
RU94033352A (en) | 1996-12-10 |
PL304954A1 (en) | 1995-03-20 |
ATE152554T1 (en) | 1997-05-15 |
HUT71140A (en) | 1995-11-28 |
CZ223394A3 (en) | 1995-04-12 |
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